top quark

Particle Physics a type of quark with a mass of c. 176 to 199 GeV/c, a positive charge that of an electron, zero charm, and zero strangeness

See top quark in American Heritage Dictionary 4

noun Abbr. t

A hypothetical quark with a charge of + ²/₃ and a mass of 360,000 times that of the electron. See Table at subatomic particle.

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